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Diesel Engine Troubleshooting Symptoms
41
Engine Vibration Excessive
This is symptom tree T-018.
Cause Correction
Engine mounting bolts are loose or the engine
mounting cushion is broken
Replace the engine mounting bolts or cushion.
OK
Engine and powertrain is out of alignment
Repair the alignment. Refer to the OEM’s
service manual.
OK
Gear train backlash is not adjusted correctly
Adjust the backlash for the gear train.
OK
Overhead components are damaged
Inspect the rocker levers, rocker shafts, and
valves for excessive damage. Replace as
necessary.
OK
Cam bushing is worn
Replace the cam bushing.
OK
Injection pump is adjusted incorrectly
Adjust or replace the injection pump.
OK
Main bearing or connecting rod is worn or
damaged
Replace the connecting rod or main bearing.